Countable and Uncountable Nouns: What are they?

I think the number of people who are confused between the ‘Countable and Uncountable Nouns’ is UNCOUNTABLE. Bad pun? I know. (It’s true though) क्या आप जानते हैं कि अंग्रेजी में सभी संज्ञाएं countable (गणनीय) नहीं हैं?

Before I move further, let me make it clear to you that when I say countable, It refers to something that can be counted in NUMBERS as in 1,2,3, and so on; and no other measureunits such as kilograms (weight), meters or inches (length), litres (volume), etc.